FEDL2215-01

1Semiconductor

ML2215

21/26

9.

Buzzer

You can define a buzz phrase by setting a frequency and sound type in the Phrase Control Table and a buzz phrase

in the User’s Data area. To start buzzer output via the MD pin, activate a buzz phrase. To stop buzzer output, enter

the Stop Code.

4 buzzing sound types, intermittent 1, intermittent 2, single and continuous, and 3 50%-duty frequencies, at 0.5

kHz, 1.0 kHz and 2.0 kHz, are available for user selection, depending on buzzer output mode setup in the Phrase

Control Table.

Figure 9.1 shows output wave-form in respective output modes. Black-filled wave-form indicates buzz output

signal at 0.5/1.0/2.0 kHz.

(a) TP1 = 0, TP0 = 0 (intermittent 1)

(b) TP1 = 0, TP0 = 1 (intermittent 2)

(c) TP1 = 1, TP0 = 0 (single)

(d) TP1 = 1, TP0 = 1 (continuous)

Figure 9.1 Output Wave-form from the Buzzer Driver in Each Output Mode

ON

STOP

OFF

BUSYB

8 Hz

OUTPUT MD

ON

OFF

STOP

BUSYB

8 Hz

OUTPUT MD

1 Hz

ON

OFF

STOP

BUSYB

32 Hz

OUTPUT MD

ON

OFF

STOP

BUSYB

OUTPUT MD